aws-ts-langchain

This is the demo Repo for the AWS TS Language Chain Meetup in Lisbon. It uses the LangChain TypeScript library.

Bootstrap

ACCOUNT_DEV_ID=981237193288
yarn cdk bootstrap aws://$ACCOUNT_DEV_ID/us-east-1

Deploy

Load your AWS credentials into your shell environment like with your AWS SSO landing page like https://damadden.awsapps.com/start#/ .

yarn cdk deploy "langchain-stack" --require-approval never

After deploying you need to put your OpenAI Api Key into the AWS Secret named OpenAiKey...

First LangChain App

This LangChain App chains to LLM Chains.

Prompt 1: I want to open a restaurant for {cuisine} food. Suggest a fancy name for this.

Prompt 2: Suggest some menu items for {restaurant_name}. Return it as a comma-separated string.

Those two prompts are chained and will return the name for the restaurant and suggestions for menu items.

URL=https://mlmtzplhdet2ha3yvxuegcnhze0qepwh.lambda-url.us-east-1.on.aws
curl -X POST $URL \
    -H 'Content-type: application/json' \
    -d '{"cuisine": "German"}' | jq .

Second LangChain App

This LangChain App possesses an AWS DynamoDB Memory.

Prompt: I want to open a restaurant for {cuisine} food. Suggest a fancy name for this.

URL=https://a5ewfijwkvfgrptv7z336cnfvm0yxawl.lambda-url.us-east-1.on.aws
curl -X POST $URL \
    -H 'Content-type: application/json' \
    -d '{"cuisine": "Italien", "user": "martin"}' | jq .

Example queries